L4::Ipc::Varg Class Reference

Variably sized RPC argument. More...

#include <ipc_varg>

Inherited by L4::Ipc::Varg_t< T >.

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Public Types
typedef l4_umword_t	Tag
	The data type for the tag.

Public Member Functions
L4_varg_type	type () const
unsigned	length () const
	Get the size of the RPC argument.
Tag	tag () const
void	tag (Tag tag)
	Set Varg tag (usually from message)
void	data (char const *d)
	Set Varg to indirect data value (usually in UTCB)
char const *	data () const
	Varg ()=default
	Make uninitialized Varg.
	Varg (L4_varg_type t, void const *v, int len)
	Make an indirect varg.
template<typename V >
Va_type< V >::Ret_value	value () const
template<typename T >
bool	is_of () const
bool	is_nil () const
bool	is_of_int () const
template<typename T >
bool	get_value (typename Va_type< T >::Value *v) const
	Get the value of the Varg as type T.
template<typename T >
void	set_value (void const *d)
	Set to indirect value of type T.
template<typename T >
void	set_direct_value (T val, typename L4::Types::Enable_if< sizeof(T)<=sizeof(char const *), bool >::type=true)
	Set to directly stored value of type T.
template<typename T >
	Varg (T const *data)
	Make Varg from indirect value (pointer)
	Varg (char const *data)
	Make Varg from null-terminated string.
template<typename T >
	Varg (T data, typename L4::Types::Enable_if< sizeof(T)<=sizeof(char const *), bool >::type=true)
	Make Varg from direct value.

Detailed Description

Variably sized RPC argument.

Definition at line 107 of file ipc_varg.

Member Function Documentation

data()

char const * L4::Ipc::Varg::data ( ) const

inline

Returns

pointer to the data, also safe for direct data

Definition at line 134 of file ipc_varg.

Referenced by Varg(), Varg(), and Varg().

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get_value()

template<typename T >

bool L4::Ipc::Varg::get_value ( typename Va_type< T >::Value *  v ) const

inline

Get the value of the Varg as type T.

Template Parameters

T	The expected type of the Varg.

Parameters

v	Pointer to store the value

Returns

true when the Varg is of type T, false if not

Definition at line 196 of file ipc_varg.

is_nil()

bool L4::Ipc::Varg::is_nil ( ) const

inline

Returns

true if the Varg is of nil type.

Definition at line 183 of file ipc_varg.

Referenced by L4::Ipc::Varg_list_ref::Iterator::equals(), L4::Ipc::Varg_list_ref::Iterator::operator bool(), and L4::Ipc::Varg_list_ref::Iterator::operator++().

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is_of()

template<typename T >

bool L4::Ipc::Varg::is_of ( ) const

inline

Returns

true if the Varg is of type T

Definition at line 180 of file ipc_varg.

References type().

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is_of_int()

bool L4::Ipc::Varg::is_of_int ( ) const

inline

Returns

true if the Varg is an integer type (signed or unsigned).

Definition at line 186 of file ipc_varg.

References type().

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length()

unsigned L4::Ipc::Varg::length ( ) const

inline

Get the size of the RPC argument.

Returns

The size of the RPC argument

Definition at line 125 of file ipc_varg.

tag()

Tag L4::Ipc::Varg::tag ( ) const

inline

Returns

the tag value (the Direct_data bit masked)

Definition at line 127 of file ipc_varg.

type()

L4_varg_type L4::Ipc::Varg::type ( ) const

inline

Returns

the type field of the tag

Definition at line 120 of file ipc_varg.

Referenced by is_of(), and is_of_int().

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value()

template<typename V >

Va_type< V >::Ret_value L4::Ipc::Varg::value ( ) const

inline

Template Parameters

V	The data type of the value to retrieve.

Precondition

The Varg must be of type V (otherwise the result is unpredictable).

Returns

The value of the Varg as type V.

Definition at line 166 of file ipc_varg.

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The documentation for this class was generated from the following file:

• l4/sys/cxx/ipc_varg